A satellite is rotating in a circular orbit of radius r is around earth with speed V. Due to some reason, its speed is increased to 2 V. Then the satellite

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will start moving in a circular orbit of radius 2 r

will start moving in an orbit of major radius 2r.

will escape from the gravitational field of earth

will start moving in an elliptical orbit of major radius 4r.

answer is C.

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Detailed Solution

V = orbital speed =GMrwhen the speed is increased, V1=2V=2GMrBut 2GMr is the escape velocity at any point on the circular orbit of radius r. Hence option (3) is right.

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